Hi,
Thanks for your answer.
Maybe I have to make more clear:
The goal is to find a mechanism to block open relay servers from customers.
I see via inbound mail which domains are delivered on a certain ip address.
For example foo.com is delivered on ip address 192.168.1.2. So my simple
mind says, that I can accept outbound mail from foo.com from 192.168.1.2.
So if this customer tries to send from domain spam.com from ip address
192.168.1.2, I can block this mail, because I know that 192.168.1.2 is not
responsible for spam.com. I know this based on the inbound mail
configuration.
Is this a standard feature in Exim ?
Greetz,
Carol Overes
-----Original Message-----
From: Theo Zourzouvillys [
mailto:theo@crazygreek.co.uk]
Sent: Monday, March 04, 2002 3:26 PM
To: CarolO@???; exim-users@???
Subject: RE: [Exim] Avoiding SPAM
Hi,
If I understand what you are trying to achive correctly, you are
after "sender_address_relay" which lists the domains that senders who
relay through your system are allowed to use.
We use a mysql query for this, being:
SELECT DISTINCT Domain FROM Domains WHERE (Domain =
'${quote_mysql::${domain::$sender_address}}')
Though using a lookup in a file would be the same sort of thing, just
have something like the following in a file and do a lsearch on it:
192.168.0.1: domain1.com:domain2.com:domain3.com:blahlbha.com
192.168.0.2: meep.com:wibble.org
Etc... And do an lsearch on it.
Saying that, maybe I didn't understand the question correctly, i've
only just woken up :)
~ Theo.
Theo Zourzouvillys
Global Network Consultant
+ Notnet Consultancy [
www.notnet.co.uk ]
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> -----Original Message-----
> From: exim-users-admin@???
> [mailto:exim-users-admin@exim.org] On Behalf Of CarolO@???
> Sent: 04 March 2002 13:55
> To: exim-users@???
> Subject: [Exim] Avoiding SPAM
>
>
> All,
>
> I'm new to this mailing-list, but I have one question, which
> I can't find in the documentation.
>
> We are using exim as mail relay servers for our customers. We
> have configured inbound mail relay (from Internet via relay
> to customer) via two files. The file
> "inboundrelay_domains.conf" is used to configure all domains
> for which the server is responsible. The file
> "inboundrelay_domain2mta.conf" is configured with ip
> addresses of customer mailservers, which are responsible for
> domains. So for example:
>
> *.foo.com ==> configured in
> inboundrelay_domains.conf
> *.foo.com 192.168.1.2 byname ==> configured in
> inboundrelay_domain2mta.conf
>
> We have configured outbound relay (from customer via relay to
> Internet) via a file "outboundrelay_customer_hosts.conf".
> This looks like:
>
> 192.168.1.2/32
>
> Is there a possibility to accept only outbound mail from
> 192.168.1.2 from domain foo.com, based on the domains which
> are configured for inbound relay. In other words, is it
> possible to avoid SPAM from our customers to Internet, to use
> a "backward check" based on the inbound configuration ? Via
> the inbound configuration I know which domains are delivered
> on that specific ip address. That means that I can only
> accept mail from this specific domain from this specific ip
> address.
>
> Greetz,
>
> Carol Overes
>
> --
>
> ## List details at
> http://www.exim.org/mailman/listinfo/exim-> users Exim details
> at http://www.exim.org/ ##
>
>
>
>
